This feature allows user to specify list of subnets for global
default address pool. User can configure subnet list using
'swarm init' command. Daemon passes the information to swarmkit.
We validate the information in swarmkit, then store it in cluster
object. when IPAM init is called, we pass subnet list to IPAM driver.
Signed-off-by: selansen <elango.siva@docker.com>
Upstream-commit: f7ad95cab9cc7ba8925673a933028d53284c13f5
Component: engine
c9c36cf7eb